Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2014.2291.2297QatawnehIbrahim Awad Zamil1220141314The wireless industry is currently undergoing a major transition
from second generation to third generation wireless technologies and the increasing
demands for communication services require higher transmission rates that further
stimulates the demand on wideband technologies depicted in the form of Code
Division Multiple Access (CDMA) on one hand. Also, as the privacy is a prime
issue in modern communications then the carriers orthogonality is a fundamental
concept for a sustainable development of the communications sector. This study
attempts to assess wireless communications channels and propose techniques to
improve the performance of modern wireless communications. Hence from a strategic
perspective, an analytical study into the comparison of performance of Group
Orthogonal Multi Carrier Code Division Multiple Access (GO-MC-CDMA) and multicarrier
code division multiple access signal in frequency selective fading channel,
the channel bandwidth is the main theme of this study; from which the problems
that may affect the communications link are high lighted and measures to counterbalance
and alleviate multi path fading are proposed and investigated. Such measures
are: Space diversity combining techniques and interference cancellation and
detection are considered in this study. As a result of a comparison between
two schemes in this study it can be stipulated that sub carriers grouping does
reduce Multi-User-Interference (MUI) between frequency groups thus enhance the
performance of MC-CDMA system in the mission of meeting newly emerging wideband
communications services, such as video conference add others.]]>Qatawneh, I.A.Z.,19971997Qatawneh, I.A.Z.,200342429436Qatawneh, I.A. and M.I. Dababneh,200727386391Dababneh, M. and I.A.Z. Qatawneh,20132723Hara, S. and R. Prasad,199735126133Cai, X., S. Zhou and G.B. Giannakis,2004529099Naveen, V.J., K.M. Krishna and K.R. Rajeswari,2010251730Katariya, A., A. Yadav and N. Jain,201111013Proakis, J.G.,1998Dietze, K.,20012001Sim, H.K.,20002000Hourani, H.,20052005Rivera, J.M.L.,20092009Andrews, J.G.,2005121929Chung, Y.H. and S.M. Phoong,20112011pp: 5963Marzetta, T.L. and B.M. Hochwald,199945139157Qatawneh, I.A.Z.,20051381386Hochwald, B.M. and T.L. Marzetta,200046543564